Topic 4 Exam Questions Resistance

Size: px
Start display at page:

Download "Topic 4 Exam Questions Resistance"

Transcription

1 IGCSE Physics Topic 4 Exam Questions Resistance Name: 44 marks Q2.A light meter is used to check the light levels during a cricket match. Figure shows a cricket umpire using a light meter. Figure (a) Some light meters use a light-dependent resistor (LDR). Figure 2 shows a circuit in a light meter. Figure 2 What two measurements are needed to determine the resistance of the LDR? Measurement... Measurement 2... What will happen to the current in the circuit if the resistance of the LDR increases? () (b) The table below shows the resistance of the LDR at different light levels. Light level in lux Resistance in ohms What conclusion can you make from this data?

2 A game of cricket may be stopped if the light level falls below 00 lux. What is the potential difference across the LDR when the light level is 00 lux? Use information from Figure 2 and the table above. Potential difference =... V () (Total 6 marks) Q3. The diagram shows a simple circuit. (a) The circuit includes an LDR. What do the letters LDR stand for? Draw a ring around your answer. Light-dependable resistor light-dependent resistor light-direct resistor () (b) The graph shows how the resistance of an LDR changes with light intensity. Describe in detail how the resistance of the LDR changes as the light intensity increases from 0 to 50 lux

3 (3) (c) Complete the following sentence by drawing a ring around the correct line in the box. decrease A decrease in the light intensity of light on the LDR will not change the reading on the ammeter. increase () ii) Give a reason for your answer to part (c). () d) An LDR can be used to switch a circuit on and off automatically. In which one of the following would an LDR be used? Put a tick () in the box next to your answer. a circuit to switch on central heating when it gets cold a circuit to switch on security lighting when it gets dark a circuit to switch on a water sprinkler when the soil in a greenhouse is dry () (Total 7 marks) Q4.A bicycle light uses three light-emitting diodes (LEDs). By blackplastic [CC BY-SA 2.0], via Flickr (a) The bicycle light has three LEDs connected in parallel. Two.5 volt cells are used in series as an electrical power supply. One switch is used to turn on all three LEDs at the same time. Complete the circuit diagram to show how all the components are connected. Use the correct circuit symbols.

4 (3) (b) The diagrams show the electrical characteristics for a filament bulb and an LED. Filament bulb LED Use the graphs to compare the electrical characteristics of a filament bulb and an LED. For each difference you should refer to the characteristics of both the filament bulb and the LED. (3) Many car makers are using a set of LEDs in car lights instead of using a filament bulb. The table shows information on the characteristics of a set of LEDs and a filament bulb. Set of LEDs Filament bulb Cost Life span hours 000 hours Power consumption 5W 2W Power output (light) 3W 3W Car makers are increasing the use of sets of LEDs for cars instead of using filament bulbs.

5 Use the information in the table to give advantages and disadvantages of the change to using LEDs. (4) (Total 0 marks) Q.(a) Figure shows the apparatus used to obtain the data needed to calculate the resistance of a thermistor at different temperatures. Figure Power supply In the box below, draw the circuit symbol for a thermistor. () Use the data given in Figure to calculate the resistance of the thermistor at 20 C. Resistance =... ohms (iii) Figure 2 shows the axes for a sketch graph. Complete Figure 2 to show how the resistance of the thermistor will change as the temperature of the thermistor increases from 20 C to 00 C. Figure 2 Temperature in C () (iv) Which one of the following is most likely to include a thermistor?

6 Tick ( ) one box. An automatic circuit to switch a plant watering system on and off. An automatic circuit to switch an outside light on when it gets dark. An automatic circuit to switch a heating system on and off. () (b) The ammeter used in the circuit has a very low resistance. Why is it important that ammeters have a very low resistance? () (c) The table below gives the temperature of boiling water using three different temperature scales. Temperature Scale 00 Celsius ( C) 22 Fahrenheit ( F) 80 Réaumur ( Re) Scientists in different countries use the same temperature scale to measure temperature. Suggest one advantage of doing this () (d) A student plans to investigate how the resistance of a light-dependent resistor (LDR) changes with light intensity. The student starts with the apparatus shown in Figure 2 but makes three changes to the apparatus. One of the changes the student makes is to replace the thermistor with an LDR. Describe what other changes the student should make to the apparatus (Total 9 marks)

7 Q2.(a) A student set up the circuit shown in the diagram. The student uses the circuit to obtain the data needed to plot a current - potential difference graph for a diode. Draw, in the boxes, the circuit symbol for a diode and the circuit symbol for a variable resistor. Diode Variable resistor ii) The student made two mistakes when setting up the circuit. What two mistakes did the student make? (b) After correcting the circuit, the student obtained a set of data and plotted the graph below. Potential difference in volts At what potential difference did the diode start to conduct an electric current?

8 ... V () Use data from the graph to calculate the resistance of the diode when the potential difference across the diode is 0.3 V. Resistance =... ohms (3) (c) The diagram shows the trace produced by an alternating current (a.c.) supply on an oscilloscope. Each horizontal division on the oscilloscope screen represents a time of 0.0s. Calculate the frequency of the a.c. supply. Frequency =... hertz A diode is now connected in series with the a.c. power supply. Why does the diode cause the trace on the oscilloscope screen to change? (Total 2 marks)

9 M2.(a) current (through the LDR) in either order accept amount of amps potential difference / voltage across the LDR accept amount of volts across the LDR decrease (b) as the light level increases by a factor of 0 the resistance reduces by a factor of 5 allow for mark as the light level increases the resistance decreases [6] M3. (a) a light-dependent resistor (b) any three from: resistance starts at 500 (kilohms) (resistance) falls rapidly as intensity increases from 0 accept resistance falls accept brightness for intensity (resistance) halves between 0 and 20 lux (resistance) falls slightly between 20 and 50 lux or (resistance) almost constant / levels out between 20 and 50 lux at 50 lux, resistance = 0 (kilohms) for full credit the word resistance must be used correctly at least once an answer resistance falls as intensity increases gains 2 marks - this may be combined with one of the bullet point marks for full credit

10 3 (c) decrease resistance increases this can score without (c) (d) A circuit to switch on security lighting when it gets dark. [7] M4.(a) 3 correct LED symbols in correct direction max 2 if clear gap / break in circuit parallel circuit with 3 branches do not award this mark if there is a short circuit switch that can turn all components on / off (b) any three from: allow voltage for p.d. throughout the current can flow both ways through a bulb and only way in an LED for each mark a difference should include a reference to both LED and bulb current changes with (all) p.d. for the bulb but current changes for only some p.d. for LED current changes at varying rate for bulb current changes at constant rate for LED the diode has a very high resistance in one direction and the resistance in the bulb varies with current (in both directions) the resistance of a bulb increases with current / p.d. but the LED

11 resistance decreases after a certain pd. the bulb obeys Ohms law for a small range of p.d. the LED does not 3 any four from: Advantages lasts longer max 3 for advantages lower power consumption allow lower current same power / light output if no reference to power consumption / output allow mark for more energy efficient less heat transfer to surroundings allow less energy is wasted allow don t get as hot less waste (from broken bulbs) less cost per hour Disadvantages higher (initial) cost lower sales / profit from replacement bulbs M.(a) no increase in power / light output 4 [0] 360 allow mark for correct substitution, ie 9 = R 2 (iii) sketch graph of correct shape, ie (iv) An automatic circuit to switch a heating system on and off.

12 (b) so ammeter reduces / affects current as little as possible accept so does not reduce / change the current (it is measuring) accurate reading is insufficient not change the resistance is insufficient (c) gives a common understanding accept is easier to share results accept can compare results do not need to be converted is insufficient prevent errors is insufficient (d) replace Bunsen (and water) with a lamp accept any way of changing light level replace thermometer with light sensor accept any way of measuring a change in light level datalogger alone is insufficient [9] M2.(a) symbol for a diode accept symbol for a variable resistor voltmeter is in series or voltmeter is not in parallel ammeter is in parallel or ammeter is not in series accept an answer in terms of how the circuit should be corrected voltmeter and ammeter are wrong way around is insufficient (b) 0.2 (V) accept any value between 0.20 and 0.2 inclusive

13 37.5 allow mark for I = or allow 2 marks for correct substitution, ie 0.3 = R or allow mark for a correct substitution using I = 0.8 or I = 0.08or I = or allow 2 marks for answers of or 3.75 or 33(.3) 3 (c) 25 allow mark for obtaining period = 0.04(s) 2 diode has large resistance in reverse / one direction so stops current flow in that / one direction allow diodes only let current flow one way / direction allow mark for the diode has half-rectified the (a.c. power) supply [2]

Electricity Transition Questions Applied General in Science

Electricity Transition Questions Applied General in Science Electricity Transition Questions Applied General in Science Marks: 62 marks Pass = 30% Comments: Merit = 45% Distinction = 65% Name: Teacher: MDS Date: Q1. (a) Draw one line from each circuit symbol to

More information

The equation which links current, potential difference and resistance is:

The equation which links current, potential difference and resistance is: Q1.An electrical circuit is shown in the figure below. (a) The current in the circuit is direct current. What is meant by direct current? Tick one box. Current that continuously changes direction. Current

More information

Q2. Figure 1 shows the oscilloscope trace an alternating current (a.c.) electricity supply produces.

Q2. Figure 1 shows the oscilloscope trace an alternating current (a.c.) electricity supply produces. SERIES AND PARALEL CIRCUITS Q1. A student set up the electrical circuit shown in the figure below. (a) The ammeter displays a reading of 0.10 A. Calculate the potential difference across the 45 Ω resistor.

More information

CURRENT, POTENTIAL DIFFERENCE AND RESISTANCE PART I

CURRENT, POTENTIAL DIFFERENCE AND RESISTANCE PART I CURRENT, POTENTIAL DIFFERENCE AND RESISTANCE PART I Q1. An electrical circuit is shown in the figure below. (a) The current in the circuit is direct current. What is meant by direct current? Tick one box.

More information

INFORMATION FOR CANDIDATES

INFORMATION FOR CANDIDATES Physics Exam Y10 Electricity Test Equipment You will need: A black or blue pen A calculator Time allowed 60 minutes Full Name Tutor Group Physics Teacher INFORMATION FOR CANDIDATES This test consists of

More information

Fig [5]

Fig [5] 1 (a) Fig. 4.1 shows the I-V characteristic of a light-emitting diode (LED). 40 I / 10 3 A 30 20 10 0 1.0 1.5 2.0 V / V Fig. 4.1 (i) In Describe the significant features of the graph in terms of current,

More information

Theme 5: Electricity in the Home

Theme 5: Electricity in the Home Theme 5: Electricity in the Home!!" # # $%& $'&( ) * +,, ( * $ & $ & #.! $ & /+ $ & / " /+ 0 ' / / / / # 1 /$ %% # & ' # $ 2 $& $ 3 2 & #( ' ) & & * '% & '' + + $ % *'% & # + $ + $%' # *,, $%& $'& $, 4

More information

Summer Vacation Homework Physics O'3

Summer Vacation Homework Physics O'3 Summer vacation Homework Physics O'3 1 (a) A sound wave in air consists of alternate compressions and rarefactions along its path. Explain how a compression differs from a rarefaction. 1 Explain, in terms

More information

PhysicsAndMathsTutor.com 1

PhysicsAndMathsTutor.com 1 PhysicsAndMathsTutor.com 1 1. The figure below shows a circuit containing a battery of e.m.f. 12 V, two resistors, a light-dependent resistor (LDR), an ammeter and a switch S. The battery has negligible

More information

Draw, in the space below, a circuit diagram of this circuit. Use the correct symbols for each part of the circuit.

Draw, in the space below, a circuit diagram of this circuit. Use the correct symbols for each part of the circuit. Q1. The drawing shows the circuit used to investigate how the current through a 5 ohm (Ω) resistor changes as the potential difference (voltage) across the resistor changes. (a) Draw, in the space below,

More information

VCE PHYSICS AOS 2 UNIT 3. Circuit Design and Application

VCE PHYSICS AOS 2 UNIT 3. Circuit Design and Application VCE PHYSICS AOS 2 UNIT 3 Circuit Design and Application The Components design, investigate and analyse circuits for particular purposes using technical specifications related to potential difference (voltage

More information

Name: Period: Date: 2. In the circuit below, n charge carriers pass the point P in a time t. Each charge carrier has charge q.

Name: Period: Date: 2. In the circuit below, n charge carriers pass the point P in a time t. Each charge carrier has charge q. Name: Period: Date: IB-1 Practice Electrical Currents, Resistance, and Circuits Multiple Choice Questions 1. In the circuit below, which meter is not correctly connected? A 1 3 A 2 4 A. 1 B. 2 C. 3 D.

More information

A resistor adds resistance to a circuit. Describe what the effect of adding resistance would have on the current flowing in the circuit.

A resistor adds resistance to a circuit. Describe what the effect of adding resistance would have on the current flowing in the circuit. A. Current, Potential Difference and Resistance 1a A student builds a circuit. The circuit is shown in Figure 1. Label the components shown in Figure 1. (3) Figure 1 Voltmeter Power Supply Diode Resistor

More information

OHM S LAW. Ohm s Law The relationship between potential difference (V) across a resistor of resistance (R) and the current (I) passing through it is

OHM S LAW. Ohm s Law The relationship between potential difference (V) across a resistor of resistance (R) and the current (I) passing through it is OHM S LAW Objectives: a. To find the unknown resistance of an ohmic resistor b. To investigate the series and parallel combination of resistors c. To investigate the non-ohmic resistors Apparatus Required:

More information

Electric Circuits. Alternate Units. V volt (V) 1 V = 1 J/C V = E P /q V = W/q. Current I ampere (A) 1 A = 1 C/s V = IR I = Δq/Δt

Electric Circuits. Alternate Units. V volt (V) 1 V = 1 J/C V = E P /q V = W/q. Current I ampere (A) 1 A = 1 C/s V = IR I = Δq/Δt Electric Circuits Quantity Symbol Units Charge Q,q coulomb (C) Alternate Units Formula Electric Potential V volt (V) 1 V = 1 J/C V = E P /q V = W/q Work, energy W, E P joule (J) W = qv E P = qv Current

More information

Unit 3. Electrical Circuits

Unit 3. Electrical Circuits Strand G. Electricity Unit 3. Electrical Circuits Contents Page Representing Direct Current Circuits 2 Rules for Series Circuits 5 Rules for Parallel Circuits 9 Circuit Calculations 14 G.3.1. Representing

More information

Applications of diodes

Applications of diodes Applications of diodes Learners should be able to: (a) describe the I V characteristics of a silicon diode (b) describe the use of diodes for component protection in DC circuits and half-wave rectification

More information

(a) In the circuit below, lamps P and Q are identical. The reading on the ammeter is 3A. The cell shown is of emf. 6V. A P [2] ...

(a) In the circuit below, lamps P and Q are identical. The reading on the ammeter is 3A. The cell shown is of emf. 6V. A P [2] ... High Demand Questions QUESTIONSHEET 1 (a) In the circuit below, lamps P and Q are identical. The reading on the ammeter is 3A. The cell shown is of emf. 6V. A P Q Calculate the current that passes through

More information

Electric Currents 2 D V. (1)

Electric Currents 2 D V. (1) Name: Date: Electric Currents 2. A battery is connected in series with a resistor R. The battery transfers 2 000 C of charge completely round the circuit. During this process, 2 500 J of energy is dissipated

More information

RESISTANCE & OHM S LAW (PART I

RESISTANCE & OHM S LAW (PART I RESISTANCE & OHM S LAW (PART I and II) Objectives: To understand the relationship between potential and current in a resistor and to verify Ohm s Law. To understand the relationship between potential and

More information

Chapter 2: Electricity

Chapter 2: Electricity Chapter 2: Electricity Lesson 2.1 Static Electricity 1 e.g. a polythene rod Lesson 2.3 Electric current 1 I = Q / t = 80 / 16 = 5 A 2 t = Q / I = 96 / 6 = 16 s 1b e.g. a metal wire 2 If static charge begins

More information

Electrical Circuits Question Paper 6

Electrical Circuits Question Paper 6 Electrical Circuits Question Paper 6 Level IGCSE Subject Physics Exam Board CIE Topic Electricity and Magnetism Sub-Topic Electrical Circuits Paper Type lternative to Practical Booklet Question Paper 6

More information

Electricity. Mark Scheme. Save My Exams! The Home of Revision For more awesome GCSE and A level resources, visit us at

Electricity. Mark Scheme. Save My Exams! The Home of Revision For more awesome GCSE and A level resources, visit us at Electricity Mark Scheme Level Subject Exam Board Topic Booklet Pre U Physics Cambridge International Examinations Electricity Mark Scheme Time llowed: 56 minutes Score: /46 Percentage: /100 Grade Boundaries:

More information

GCSE Electronics. Scheme of Work

GCSE Electronics. Scheme of Work GCSE Electronics Scheme of Work Week Topic Detail Notes 1 Practical skills assemble a circuit using a diagram recognize a component from its physical appearance (This is a confidence building/motivating

More information

Resistance and Ohm s law

Resistance and Ohm s law Resistance and Ohm s law Objectives Characterize materials as conductors or insulators based on their electrical properties. State and apply Ohm s law to calculate current, voltage or resistance in an

More information

Section B: Electricity

Section B: Electricity Section B: Electricity The best way to remember the information in this chapter is to get a pen and paper and write down your answers Electricity - Current - Voltage - Power 1 What is Electricity? 2 What

More information

E 1 Ι 1 R 1 R 2 Ι 3 R 3 E 2 Ι 2

E 1 Ι 1 R 1 R 2 Ι 3 R 3 E 2 Ι 2 1 (a) A student has been asked to make an electric heater. The heater is to be rated as 12 V 60 W, and is to be constructed of wire of diameter 0.54 mm. The material of the wire has resistivity 4.9 x 10

More information

P2 Quick Revision Questions. P2 for AQA GCSE examination 2018 onwards

P2 Quick Revision Questions. P2 for AQA GCSE examination 2018 onwards P2 Quick Revision Questions Question 1... of 50 How can an insulator become charged? Answer 1... of 50 Electrons being transferred from one material to another by friction. Question 2... of 50 Fill the

More information

PhysicsAndMathsTutor.com 1

PhysicsAndMathsTutor.com 1 PhysicsAndMathsTutor.com 1 1. The figure below shows a circuit containing a battery of e.m.f. 12 V, two resistors, a light-dependent resistor (LDR), an ammeter and a switch S. The battery has negligible

More information

Electrical Measurements

Electrical Measurements Electrical Measurements INTRODUCTION In this section, electrical measurements will be discussed. This will be done by using simple experiments that introduce a DC power supply, a multimeter, and a simplified

More information

8.0 Ω 12.0 Ω. When the switch S is open, show that the potential difference between the points X and Y is 7.2 V.

8.0 Ω 12.0 Ω. When the switch S is open, show that the potential difference between the points X and Y is 7.2 V. 1. The figure below shows a circuit containing a battery of e.m.f. 12 V, two resistors, a light-dependent resistor (LDR), an ammeter and a switch S. The battery has negligible internal resistance. 8.0

More information

Vocabulary. Electric Current. Electric Circuit. Open Circuit. Conductors. Insulators. Ohm s Law Current. Voltage. Resistance.

Vocabulary. Electric Current. Electric Circuit. Open Circuit. Conductors. Insulators. Ohm s Law Current. Voltage. Resistance. Vocabulary Term Electric Current Definition Electric Circuit Open Circuit Conductors Insulators Ohm s Law Current Voltage Resistance Electrical Power Series Circuit Parallel Circuit Page 1 Symbols Used

More information

ANSWERS AND MARK SCHEMES. (a) 3 A / 2 1 = 1.5 A 1. (b) 6 V 1. (c) resistance = V / I 1 = 6 / (b) I = V / R 1 = 3 / 15 1 = 0.

ANSWERS AND MARK SCHEMES. (a) 3 A / 2 1 = 1.5 A 1. (b) 6 V 1. (c) resistance = V / I 1 = 6 / (b) I = V / R 1 = 3 / 15 1 = 0. QUESTIONSHEET (a) 3 A / 2 =.5 A (b) 6 V (c) resistance = V / I = 6 /.5 = 4 Ω QUESTIONSHEET 2 TOTAL / 6 (a) 5 Ω + 0 Ω = 5 Ω (b) I = V / R = 3 / 5 = 0.2 A Units are essential in calculations. Sometimes eamination

More information

Wallace Hall Academy Physics Department. Electricity. Pupil Notes Name:

Wallace Hall Academy Physics Department. Electricity. Pupil Notes Name: Wallace Hall Academy Physics Department Electricity Pupil Notes Name: 1 Learning intentions for this unit? Be able to state that there are two types of charge; positive and negative Be able to state that

More information

ELECTRIC Circuits Test

ELECTRIC Circuits Test ELECTRIC Circuits Test Name: /50 Multiple Choice (1 mark each) ( 13 marks) 1. Circle the best answer for each of the multiple choice questions below: Quantity measured Units used 1 -- potential difference

More information

Sensor, Op-amp comparator, and output revision.

Sensor, Op-amp comparator, and output revision. Sensor, Op-amp comparator, and output revision. 1). For growing tropical plants it is necessary to ensure that the greenhouses are maintained at a minimum temperature at all times. An electronic systems

More information

Book page Syllabus 2.8, 2.9, Series and parallel circuits

Book page Syllabus 2.8, 2.9, Series and parallel circuits Book page 77 79 Syllabus 2.8, 2.9, 2.14 Series and parallel circuits Find the Fib! (1) The symbol for a bulb is (2) In a parallel circuit potential difference is the same as the supply voltage on all branches.

More information

Calculate the maximum amount of energy this battery can deliver.

Calculate the maximum amount of energy this battery can deliver. 1 A battery in a laptop computer has an electromotive force (emf) of 14.8 V and can store a maximum charge of 15. 5 10 3 C. The battery has negligible internal resistance. Calculate the maximum amount

More information

Transformers. Question Paper. Save My Exams! The Home of Revision. Subject Physics (4403) Exam Board. Keeping Things Moving. Page 1.

Transformers. Question Paper. Save My Exams! The Home of Revision. Subject Physics (4403) Exam Board. Keeping Things Moving. Page 1. Transformers Question Paper Level IGCSE Subject Physics (4403) Exam Board AQA Unit P3 Topic Keeping Things Moving Sub-Topic Transformers Booklet Question Paper Time Allowed: 58 minutes Score: /58 Percentage:

More information

GCSE Physics. The PiXL Club Ltd, Company number

GCSE Physics.   The PiXL Club Ltd, Company number he PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club The PiXL Club he PiXL

More information

Farr High School HIGHER PHYSICS. Unit 3 Electricity. Exam Question Booklet

Farr High School HIGHER PHYSICS. Unit 3 Electricity. Exam Question Booklet Farr High School HIGHER PHYSICS Unit 3 Electricity Exam Question Booklet 1 2 MULTIPLE CHOICE QUESTIONS 1. 3. 2. 4. 3 5. 6. 7. 4 8. 9. 5 10. 11. 6 12. 13. 14. 7 15. 16. 17. 8 18. 20. 21. 19. 9 MONITORING

More information

D V (Total 1 mark)

D V (Total 1 mark) 1. One electronvolt is equal to A. 1.6 10 19 C. B. 1.6 10 19 J. C. 1.6 10 19 V. D. 1.6 10 19 W. 2. A battery of internal resistance 2 Ω is connected to an external resistance of 10 Ω. The current is 0.5

More information

TO INVESTIGATE THE VARIATION OF CURRENT (I) WITH P.D. (V) FOR (a) A METALLIC CONDUCTOR

TO INVESTIGATE THE VARIATION OF CURRENT (I) WITH P.D. (V) FOR (a) A METALLIC CONDUCTOR FOR (a) A METALLIC CONDUCTOR Low voltage power supply, rheostat, voltmeter, ammeter, length of nichrome wire. 6 A - Nichrome wire 1. Set up the circuit as shown and set the voltage supply at 6 d.c. 2.

More information

UNIVERSITY OF TECHNOLOGY, JAMAICA School of Engineering -

UNIVERSITY OF TECHNOLOGY, JAMAICA School of Engineering - UNIVERSITY OF TECHNOLOGY, JAMAICA School of Engineering - Electrical Engineering Science Laboratory Manual Table of Contents Safety Rules and Operating Procedures... 3 Troubleshooting Hints... 4 Experiment

More information

ELECTRICAL CIRCUITS. All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison

ELECTRICAL CIRCUITS. All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison Ohm s Law I = V / R I V R = Current (Amperes) (amps) = Voltage (Volts) = Resistance (ohms) Georg

More information

6-2 Electricity Trilogy

6-2 Electricity Trilogy 6-2 Electricity Trilogy.0 Most domestic appliances are connected to the mains electricity.. What is the frequency of mains electricity? Tick one box [ mark].05 A 50 Hz 230 V.2 What is the potential difference

More information

Syllabus OP49 Test electrical conduction in a variety of materials, and classify each material as a conductor or insulator

Syllabus OP49 Test electrical conduction in a variety of materials, and classify each material as a conductor or insulator Physics: 14. Current Electricity Please remember to photocopy 4 pages onto one sheet by going A3 A4 and using back to back on the photocopier Syllabus OP49 Test electrical conduction in a variety of materials,

More information

Voltage Current and Resistance II

Voltage Current and Resistance II Voltage Current and Resistance II Equipment: Capstone with 850 interface, analog DC voltmeter, analog DC ammeter, voltage sensor, RLC circuit board, 8 male to male banana leads 1 Purpose This is a continuation

More information

Maltase cross tube. D. Senthilkumar P a g e 1

Maltase cross tube.  D. Senthilkumar P a g e 1 Thermionic Emission Maltase cross tube Definition: The emission of electrons when a metal is heated to a high temperature Explanation: In metals, there exist free electrons which are able to move around

More information

1 Ω = 1 V A -1 ELECTRICAL RESISTANCE (R) 1. Candidates should be able to:

1 Ω = 1 V A -1 ELECTRICAL RESISTANCE (R) 1. Candidates should be able to: ELECTRCAL RESSTANCE (R) 1 Candidates should be able to: Define RESSTANCE. Of a conductor or component is a measure of its opposition to the flow of charge (i.e. to electric current). Select and use the

More information

Figure 1. (b) (i) State what happens to the resistance of the filament lamp as the current increases.

Figure 1. (b) (i) State what happens to the resistance of the filament lamp as the current increases. Q1.(a) Sketch, on Figure 1, the current voltage (IV) characteristic for a filament lamp for currents up to its working power. Figure 1 (b) (i) State what happens to the resistance of the filament lamp

More information

Resistive components in circuits

Resistive components in circuits Resistive components in circuits Learners should be able to: (a) describe the effect of adding resistors in series and (b) use equations for series and parallel resistor combinations resistors in series

More information

8) Name three more types of circuits that we will not study in this class.

8) Name three more types of circuits that we will not study in this class. Name Concepts:( power ) 1) What is power? 2) What are the three equations for electrical power? 3) What are two units for power? 4) What does the power company sell its customers? 5) What is the unit sold

More information

UNIVERSITY OF TECHNOLOGY, JAMAICA SCHOOL OF ENGENEERING. Electrical Engineering Science. Laboratory Manual

UNIVERSITY OF TECHNOLOGY, JAMAICA SCHOOL OF ENGENEERING. Electrical Engineering Science. Laboratory Manual UNIVERSITY OF TECHNOLOGY, JAMAICA SCHOOL OF ENGENEERING Electrical Engineering Science Laboratory Manual Table of Contents Experiment #1 OHM S LAW... 3 Experiment # 2 SERIES AND PARALLEL CIRCUITS... 8

More information

Unit 4: Electricity (Part 1)

Unit 4: Electricity (Part 1) Unit 4: Electricity (Part 1) Learning Outcomes Students should be able to: 1. Explain what is meant by current, potential difference and resistance, stating their units 2. Draw and interpret circuit diagrams

More information

Episode 108: Resistance

Episode 108: Resistance Episode 108: Resistance The idea of resistance should be familiar (although perhaps not secure) from pre-16 science course, so there is no point pretending that this is an entirely new concept. A better

More information

Standard Grade Physics

Standard Grade Physics Standard Grade Physics North Berwick High School Physics Department UNIT 2 Homework Sheets Working at Home TO THE PUPIL Each day you have physics at school, you should set aside time for work at home.

More information

= V IN. and V CE. = the supply voltage 0.7 V, the transistor is on, V BE. = 0.7 V and V CE. until saturation is reached.

= V IN. and V CE. = the supply voltage 0.7 V, the transistor is on, V BE. = 0.7 V and V CE. until saturation is reached. Switching Circuits Learners should be able to: (a) describe and analyse the operation and use of n-channel enhancement mode MOSFETs and npn transistors in switching circuits, including those which interface

More information

Common Sensors. Understand the following sensors: Pull Up sensor Pull Down sensor Potentiometer Thermistor

Common Sensors. Understand the following sensors: Pull Up sensor Pull Down sensor Potentiometer Thermistor Common Sensors Understand the following sensors: Pull Up sensor Pull Down sensor Potentiometer Thermistor Pull Up Switch (sensor) VERY low current 12 volt Pull Up Switch (sensor) VERY low current 12 volt

More information

Lightbulbs and Dimmer Switches: DC Circuits

Lightbulbs and Dimmer Switches: DC Circuits Introduction It is truly amazing how much we rely on electricity, and especially on devices operated off of DC current. Your PDA, cell phone, laptop computer and calculator are all examples of DC electronics.

More information

Series and parallel resistances

Series and parallel resistances Series and parallel resistances Objectives Calculate the equivalent resistance for resistors connected in both series and parallel combinations. Construct series and parallel circuits of lamps (resistors).

More information

CHAPTER 9: ELECTRONICS

CHAPTER 9: ELECTRONICS CHAPTER 9: ELECTRONICS 9.1 Cathode Rays 9.1.1 Thermionic Emission Thermionic emission is the emission of electrons from a heated metal surface. Factors that influence the rate of thermionic emission: Temperature

More information

Resistance and Ohm s Law

Resistance and Ohm s Law Resistance and Ohm s Law Textbook pages 290 301 Section 8.3 Summary Before You Read Do you think electrons can move through all conducting substances equally well? Give your reasons why or why not on the

More information

the total number of electrons passing through the lamp.

the total number of electrons passing through the lamp. 1 (a) A 12 V 36 W lamp is lit to normal brightness using a 12 V car battery of negligible internal resistance. The lamp is switched on for one hour (3600 s). For the time of 1 hour, calculate the energy

More information

Module 1, Lesson 2 Introduction to electricity. Student. 45 minutes

Module 1, Lesson 2 Introduction to electricity. Student. 45 minutes Module 1, Lesson 2 Introduction to electricity 45 minutes Student Purpose of this lesson Explanations of fundamental quantities of electrical circuits, including voltage, current and resistance. Use a

More information

PS 12b Lab 1c IV Curves

PS 12b Lab 1c IV Curves Names: 1.) 2.) 3.) PS 12b Lab 1c IV Curves Learning Goal: Understand I- V curves for ohmic and non- ohmic devices (light bulb, resistor, Light Emitting Diode (LED), and Thermistor. Work with a Field Effect

More information

BSE Physics II Experiment 03 Applications on Ohm's Law. # Student ID Student Name Grade (10) 1 2 3

BSE Physics II Experiment 03 Applications on Ohm's Law. # Student ID Student Name Grade (10) 1 2 3 BSE 104 - Physics II Experiment 03 Applications on Ohm's Law # Student ID Student Name Grade (10) 1 2 3-1 / 12 Dr. Ahmed ElShafee Experiment (3.1) An Incandescent Lamp is not an Ohmic Resistor Objective

More information

ExamLearn.ie. Current Electricity

ExamLearn.ie. Current Electricity ExamLearn.ie Current Electricity Current Electricity An electric current is a flow of electric charge. If a battery is connected to each end of a conductor, the positive terminal will attract the free

More information

Electronics & Control

Electronics & Control Electronics & Control Analogue Electronics Introduction By the end of this unit you should be able to: Know the difference between a series and parallel circuit Measure voltage in a series circuit Measure

More information

MARK SCHEME for the October/November 2014 series 0625 PHYSICS. 0625/62 Paper 6 (Alternative to Practical), maximum raw mark 40

MARK SCHEME for the October/November 2014 series 0625 PHYSICS. 0625/62 Paper 6 (Alternative to Practical), maximum raw mark 40 CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International General Certificate of Secondary Education MARK SCHEME for the October/November 2014 series 0625 PHYSICS 0625/62 Paper 6 (Alternative to Practical),

More information

AQA GCSE Physics Required Practicals

AQA GCSE Physics Required Practicals Paper 2 Paper 1 AQA GCSE Physics Required Practicals An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent

More information

Physics: 15. Electronics

Physics: 15. Electronics Physics: 15. Electronics Please remember to photocopy 4 pages onto one sheet by going A3 A4 and using back to back on the photocopier Syllabus OP57 Describe a diode as a device that allows current to flow

More information

Study of 1-phase AC to DC controlled converter (both fully controlled And half controlled)

Study of 1-phase AC to DC controlled converter (both fully controlled And half controlled) Study of 1-phase AC to DC controlled converter (both fully controlled And half controlled) Object: To study the performances of single phase half-controlled bridge Rectifier. A. In configuration A. B.

More information

DET: Technological Studies Applied Electronics Intermediate 2

DET: Technological Studies Applied Electronics Intermediate 2 DET: Technological Studies Applied Electronics Intermediate 2 4597 Spring 1999 HIGHER STILL DET: Technological Studies Applied Electronics Intermediate 2 Support Materials *+,-./ CONTENTS Teacher s guide

More information

Name Class Date. Brightness of Light

Name Class Date. Brightness of Light Skills Practice Lab Brightness of Light IN-TEXT LAB CBL VERSION The brightness, or intensity, of a light source may be measured with a light meter. In this lab, you will use a light meter to measure the

More information

Figure 1. Why is iron a suitable material for the core of a transformer?

Figure 1. Why is iron a suitable material for the core of a transformer? INDUCED POTENTIAL, TRANSFORMERS: NAT GRID Q1. Figure 1 shows the construction of a simple transformer. Figure 1 Why is iron a suitable material for the core of a transformer? Tick one box. It is a metal.

More information

18-3 Circuit Analogies, and Kirchoff s Rules

18-3 Circuit Analogies, and Kirchoff s Rules 18-3 Circuit Analogies, and Kirchoff s Rules Analogies can help us to understand circuits, because an analogous system helps us build a model of the system we are interested in. For instance, there are

More information

Figure 1. (a) The wire in an unused probe has a resistance of Ω and a length of 0.50 m. Calculate the diameter of the wire.

Figure 1. (a) The wire in an unused probe has a resistance of Ω and a length of 0.50 m. Calculate the diameter of the wire. A wire probe is used to measure the rate of corrosion in a pipe carrying a corrosive liquid. The probe is made from the same metal as the pipe. Figure shows the probe. The rate of corrosion of the wire

More information

2. What is the difference between an analogue watch and a digital watch? (2)

2. What is the difference between an analogue watch and a digital watch? (2) ELECTRONICS HOMEWORK 1 1. Make a table with two columns headed Analogue and Digital. Place the following electronic devices into one of the two columns: (4) 7 segment display, motor, solenoid, bulb, LED,

More information

A-level Physics. PHY6T/Q14 Final Marking Guidelines. 2450/2455 June 2014 PMT. Version/Stage: 1.0 Final Marking Guidelines

A-level Physics. PHY6T/Q14 Final Marking Guidelines. 2450/2455 June 2014 PMT. Version/Stage: 1.0 Final Marking Guidelines A-level Physics PHY6T/Q4 Final Marking Guidelines 450/455 June 04 Version/Stage:.0 Final Marking Guidelines Final MARKING GUIDELINES A-LEVEL PHYSICS PHY6T/Q4 JUNE 04 Guidance for teachers marking Physics

More information

Chapter 23 Electric Current (cont.)

Chapter 23 Electric Current (cont.) Chapter 23 Electric Current (cont.) Direct current and alternating current Electric power Electric circuits 1 Direct Current and Alternating Current Pulsating dc Time Time graphs of dc. Electric current

More information

Current, resistance, and Ohm s law

Current, resistance, and Ohm s law Current, resistance, and Ohm s law Apparatus DC voltage source set of alligator clips 2 pairs of red and black banana clips 3 round bulb 2 bulb sockets 2 battery holders or 1 two-battery holder 2 1.5V

More information

PHYSICS EXPERIMENTS (ELECTRICITY)

PHYSICS EXPERIMENTS (ELECTRICITY) PHYSICS EXPERIMENTS (ELECTRICITY) In the matter of physics, the first lessons should contain nothing but what is experimental and interesting to see. A pretty experiment is in itself often more valuable

More information

KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS

KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS MANG U HIGH SCHOOL 232/1 PHYSICS PAPER 2 SCHOOLS NET KENYA Osiligi House, Opposite KCB, Ground Floor Off Magadi Road, Ongata

More information

A2 WAVES. Waves. 1 The diagram represents a segment of a string along which a transverse wave is travelling.

A2 WAVES. Waves. 1 The diagram represents a segment of a string along which a transverse wave is travelling. A2 WAVES Waves 1 The diagram represents a segment of a string along which a transverse wave is travelling. (i) What is the amplitude of the wave? [1] (ii) What is the wavelength of the wave? [1] (iii)

More information

Physics 120 Lab 1 (2018) - Instruments and DC Circuits

Physics 120 Lab 1 (2018) - Instruments and DC Circuits Physics 120 Lab 1 (2018) - Instruments and DC Circuits Welcome to the first laboratory exercise in Physics 120. Your state-of-the art equipment includes: Digital oscilloscope w/usb output for SCREENSHOTS.

More information

1 What is an example of a device that changes chemical energy into electrical energy? (A) battery (B) generator (C) light bulb (D) transformer

1 What is an example of a device that changes chemical energy into electrical energy? (A) battery (B) generator (C) light bulb (D) transformer Assignment 1 Electricity Name: 1 What is an example of a device that changes chemical energy into electrical energy? (A) battery (B) generator (C) light bulb (D) transformer 2 What is the definition for

More information

LAB 2 Circuit Tools and Voltage Waveforms

LAB 2 Circuit Tools and Voltage Waveforms LAB 2 Circuit Tools and Voltage Waveforms OBJECTIVES 1. Become familiar with a DC power supply and setting the output voltage. 2. Learn how to measure voltages & currents using a Digital Multimeter. 3.

More information

Physics 4B, Lab # 2 Circuit Tools and Voltage Waveforms

Physics 4B, Lab # 2 Circuit Tools and Voltage Waveforms Physics 4B, Lab # 2 Circuit Tools and Voltage Waveforms OBJECTIVES 1. Become familiar with a DC power supply and setting the output voltage. 2. Learn how to measure voltages & currents using a Digital

More information

PHYSICS 3204 PUBLIC EXAM QUESTIONS (Electric Circuits)

PHYSICS 3204 PUBLIC EXAM QUESTIONS (Electric Circuits) PHYSICS 3204 PUBLIC EXAM QUESTIONS (Electric Circuits) NAME: August 2009------------------------------------------------------------------------------------------------------------------ 26. What is the

More information

Chapter 5: DC voltage.

Chapter 5: DC voltage. Chapter 5: DC voltage. 1. Introduction to electric circuits A. Electric generator (dry cell) - An electric generator transforms any form of energy into electrical energy e.g. Battery or dry cell converts

More information

ELECTRONICS STARTER KIT

ELECTRONICS STARTER KIT ELECTRONICS STARTER KIT (MAP 474 - N02QQ) R These five small self-assembly circuits cover basic principles of electronics and can be adapted for numerous practical application. The five circuits include

More information

GCSE (9-1) WJEC Eduqas GCSE (9-1) in ELECTRONICS ACCREDITED BY OFQUAL DESIGNATED BY QUALIFICATIONS WALES SAMPLE ASSESSMENT MATERIALS

GCSE (9-1) WJEC Eduqas GCSE (9-1) in ELECTRONICS ACCREDITED BY OFQUAL DESIGNATED BY QUALIFICATIONS WALES SAMPLE ASSESSMENT MATERIALS GCSE (9-1) WJEC Eduqas GCSE (9-1) in ELECTRONICS ACCREDITED BY OFQUAL DESIGNATED BY QUALIFICATIONS WALES SAMPLE ASSESSMENT MATERIALS Teaching from 2017 For award from 2019 GCSE ELECTRONICS Sample Assessment

More information

Technological Studies. - Applied Electronics (H) TECHNOLOGICAL STUDIES HIGHER APPLIED ELECTRONICS. Transistors. Craigmount High School 1

Technological Studies. - Applied Electronics (H) TECHNOLOGICAL STUDIES HIGHER APPLIED ELECTRONICS. Transistors. Craigmount High School 1 TECHNOLOGICAL STUDIES HIGHER APPLIED ELECTRONICS Transistors Craigmount High School 1 APPLIED ELECTRONICS Outcome 1 - Design and construct electronic systems to meet given specifications When you have

More information

PhysicsAndMathsTutor.com 1

PhysicsAndMathsTutor.com 1 Q1. (a) A metal wire of length 1.4 m has a uniform cross-sectional area = 7.8 10 7 m 2. Calculate the resistance, R, of the wire. resistivity of the metal = 1.7 10 8 Ωm............ (b) The wire is now

More information

Physics 1051 Laboratory #4 DC Circuits and Ohm s Law. DC Circuits and Ohm s Law

Physics 1051 Laboratory #4 DC Circuits and Ohm s Law. DC Circuits and Ohm s Law DC Circuits and Ohm s Law Contents Part I: Objective Part II: Introduction Part III: Apparatus and Setup Part IV: Measurements Part V: Analysis Part VI: Summary and Conclusions Part I: Objective In this

More information

Putting it All Together

Putting it All Together Putting it All Together 1. Vocabulary Review Write the term that correctly completes each statement. Use each term once. ampere electric current resistor battery series connection parallel connection electric

More information

State an equation giving the total power delivered by the battery.

State an equation giving the total power delivered by the battery. Electricity Paper2 (set 1) 1. This question is about electric circuits. (a) Define (i) electromotive force (emf ) of a battery. (1) (ii) electrical resistance of a conductor. (1) (b) A battery of emf ε

More information

Lab 2: DC Circuits Lab Assignment

Lab 2: DC Circuits Lab Assignment 2 class days 1. I-V curve for various components Source: Curtis, 1.2.1. (HH 1.1, 1.2, 1.3) Lab 2: DC Circuits Lab Assignment A passive element is a two-contact device that contains no source of power or

More information

Refer to your text book (page 349 to 352) (1) Draw a circuit diagram to represent the wiring in a typical parallel circuit.

Refer to your text book (page 349 to 352) (1) Draw a circuit diagram to represent the wiring in a typical parallel circuit. SERIES and PARALLEL CIRCUITS Refer to your text book (page 349 to 352) (1) Draw a circuit diagram to represent the wiring in a typical parallel circuit. (2) What are some of the advantages of using parallel

More information